Ive never heard of blood meal or bone meal, but my mom(hehe) says its good to keep out pests. The manure on the other hand, is a very good fert. But not for young plants. Young plants need a high (N) nitrogen neut., but low (PH) Phospherus. Manure is high in (PH). on the other hand though, when your babys flower, they need a high (PH) level, and low (N) level...so then u would use the manure. Im just quoting my moms green thumb though, so get some others advice also. Hope I helped a little babygurl, keep me posted!!